Fix duplicate download IDs.

Fixes https://github.com/profanity-im/profanity/issues/1794

Explanation
The problem is the download's identifier. Downloads are given an ID so they can be referenced later when their progress changes. Currently, the download's ID is the download's URL. When you download the same file twice, you have two downloads with the same ID. Download progress updates are shown on the first of both downloads with the same ID.

Solution
Change the download's ID from its URL to a random number. A random ID is generated when get_random_string() is called from cmd_funcs.c. Several other functions are updated to cope with the new ID format.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/tools/aesgcm_download.h b/src/tools/aesgcm_download.h
index c0096f1d..796b9389 100644
--- a/src/tools/aesgcm_download.h
+++ b/src/tools/aesgcm_download.h
@@ -50,6 +50,7 @@
 
 typedef struct aesgcm_download_t
 {
+    char* id;
     char* url;
     char* filename;
     char* cmd_template;